394212447 has 8 divisors (see below), whose sum is σ = 584018480.
Its totient is φ = 262808280.
The previous prime is 394212443. The next prime is 394212451. The reversal of 394212447 is 744212493.
394212447 is a `hidden beast` number, since 394 + 21 + 244 + 7 = 666.
It is an interprime number because it is at equal distance from previous prime (394212443) and next prime (394212451).
It is not a de Polignac number, because 394212447 - 22 = 394212443 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (394212443) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7300204 + ... + 7300257.
It is an arithmetic number, because the mean of its divisors is an integer number (73002310).
Almost surely, 2394212447 is an apocalyptic number.
394212447 is a deficient number, since it is larger than the sum of its proper divisors (189806033).
394212447 is a wasteful number, since it uses less digits than its factorization.
394212447 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 14600470 (or 14600464 counting only the distinct ones).
The product of its digits is 48384, while the sum is 36.
The square root of 394212447 is about 19854.7839827080.
The cubic root of 394212447 is about 733.2354338778.
The spelling of 394212447 in words is "three hundred ninety-four million, two hundred twelve thousand, four hundred forty-seven".